Bike Forums - View Single Post - French BB Velo Sq Taper + SunRace 9spd Crankset
Old 03-28-20, 01:23 PM
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bikemig 
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Also the bottom bracket might be swiss threaded, not French, in which case the BB you are buying will not work. In a French BB, both sides are right hand threaded; in Swiss, the fixed cup is left hand threaded.

https://bikeretrogrouch.blogspot.com...m-bracket.html

Many Motobecanes do have swiss threaded BBs. They are also harder to find but not impossible. IRD sells cups for swiss threaded BBs and that may be the least expensive option.

https://www.interlocracing.com/shop/...bottom+bracket

You will want to post this question along with pics of the bike in the C&V forum. They may be able to help you sort out whether your BB is French or Swiss.
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